Facebook has improved its Analytics for Facebook Fan Pages, Insights. This improvements will allow Administrators to see and understand what kinds of posts have the best engagement among their Fans. For example, you will now be able to see the relative preference of users of Text vs Images vs Videos.

In addition to the breakdown on the type of content users engage with, Administrators will also be able to see see demographic data on how users are engaging with their Page. This should be a welcome addition for anyone advertising on Facebook as they will now be able to better align their advertising with targeted users.

There are some great images over on Mashable and Facebook's Blog of the new interface. I've included a few below.